Tom Brady hands it off to his running back on the 10th yard line. The running back runs 90 yards to the end zone to score a touchdown in 9 seconds. What is the running back's speed?

All forces cause motion? true or false

State one important difference between a physical change and a chemical change?

Essay-alternative energy sources research sources of energy that are being developed. write a report of 350-400 words discussing the information you learned concerning the development of various energy sources and the impact that you think they will have on your life. include sources cited at the end of your report using the mla format. follow the rubric guidelines. note that wikipedia is not an appropriate resource for a research paper. worth 99